Disk drill.



. PATENTED APR. 23, 1907. s. E. DAVIS & T. BRENNAN, JR-

DISK DRILL.

APPLICATION FILED JULY23,1906.

2 SHEETS-SHEET 1.

THE nonms PETERS ca, WASHINGTON, v. c.

No. 850,999. PATENTED APR. 23, I907.

S. E. DAVIS & T. BRENNAN, J3.

DISK DRILL; APPLICATION FILED JULY 23. 1906 2 SHEETS-SHEET 2.

g M mmwdw ii I W2 m an j w THE name's PETERS co, WASHINGTON. n. c.

UNITED STATES PATENT OFFICE.

SPENCER E. DAVIS, OF MINNEAPOLIS, AND THOMAS BRENNAN, JR., OF ST LOUIS PARK, MINNESOTA.

DISK DRILL.

Specification of Letters Patent.

Patented April 23, 1907.

To all whom it may concern:

Be it known that we, SPENoER E. DAVIS and THoMAs BRENNAN, Jr., citizens of the United States, residing, respectively, at Minneapolis and St. Louis Park, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Disk Drills; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Our invention relates to disk drills, and has for its object to improve the same in the several particulars hereinafter noted.

One of the principal objects of this invention is to provide a construction in which small disks and a correspondingly small boot may be employed. Hitherto it has been necessary to employ comparatively large disks, chiefly because of the fact that the journals connecting the disks to the boot have been projected outward of the disks, so that less than one-half of the disks have been serviceable in opening up the furrow. The said projecting ournals or hub portions also collect and hold mud when working in wet ground.

We have found in practice that by arranging the journals which connect the disks to the boot entirely on the inner sides of the disks very much smaller disks and boots may be employed than have hitherto been employed and that better results generally can be obtained by this improved arrangement. By this arrangement the projecting hub portions on the outer sides of the disks are eliminated, thereby permitting the disks to work deeper in the ground relative to their diameters, and thereby removing from the outer surfaces of the disks projections to which mud can readily adhere. Other very greatly improved results are obtained by making the boot in two parts or sections and in a novel arrangement therewith of diskj ournaling devices and other parts.

The invention also involves other features of improvement, all of which are hereinafter described, and defined in the claims.

The invention is illustrated in the accompanying drawings, wherein like characters indicate like parts throughout the several vlews.

Referring to the drawings, Figure 1 is a view in side elevation, showing one of the disk attachments embodying the several features of our invention. Fig. 2 is a transverse section taken on the line 00 90 of Fig. 1. Fig. 3 is a plan view of the divided or twopart boot, showing the parts thereof separated. Fig. 4 is a detail in section, taken on the line 90 90 of Fig. 1. Fig. 5 is a view in elevation, showing the two sections of the boot separated and turned with their inner faces exposed to view. Fig. 6 is a detail in horizontal section, taken on the line as as of Fig. 1. Fig. 7 is a detail, partly in plan and partly in section, showing a novel device by which the scrapers are connected to their supporting-arms; and Fig. 8 is a detail in horizontal section, illustrating a modified construction of the boot and the journal devices for connecting the disks to the boot.

The boot (shown in all the views except Fig. 8) is made up of two sections but it will be first described as if it were a single integrally -formed casting, and thereafter the lines on which the division or separation between the two parts is made will be noted. The upper portion 1 of the boot is of segmental form and is formed as part of an approximately vertical hollow stem 2, the lower extremity of which terminates in a hollow bearing-hub 3. An oil-duct 4 in the stem 2 opens into the bearing-hub 3. The upper extremity of the oil-duct 4 is preferably enlarged and threaded at 5, adapted to receive either a plug or a suitable oil-supplying device. (Not shown.) In its upper portion, just forward of the stem 2, the boot is formed with a ball-containing socket 6, that loosely holds a perforatedball 7 through or into which is passed the delivery end of a tubular seedsprout 8. boot is formed with a channeled forwardlyprojecting arm 9, in which is seated the rear end of a drag-b ar 10. The drag-b ar 10 is rigidly secured to the arm 9 by means of short nutted bolts 1 1, that are passed through boltholes 12 of the said arm 9. Depending from the arm 9 the boot is formed with asegmental guard-arm 13 that closes the space between the upper forward portions of the two disks. The rear extremity of the segmental body portion 1 of the boot is, as shown, formed with laterally-spaced perforated lugs 14 and Just forward of the socket 6 the at the rear these lugs are turned downward to form an inside scraper 15. At the junction of the arm 9 with the socket 6 of the bootis a pair of transversely-extendedscraperarm-receiving sockets 16, through the upper portion of each of which Works a set-screw 17.

By reference to Figs. 2 and 3 it will be seen that the arm 9, socket 6, and segmental body portion 10f the boot are split centrally on a line marked y and that the stem 2 and hub 3 are split vertically and centrally. Otherwise stated, the arm 9, socket 6, socket 16, oil-duct 4, and bolt-holes 12 are split in two or divided. It will aslo be noted that the depending guard-arm 13 and scraper 15 are formed as part of the right-hand section of the boot. As shown, the two sections of the boot are normally rigidly secured together by three screws 18, 19, and 20. The abutting faces of the two sections of the stem portion 2 are preferably united by an interlapping tongue and groove 21, formed the one on each of the said sections and extending on both sides of the oil-passage 4 from the top thereof and completely around the hub 3. This tongue-and groove joint 21 assists in properly alining the two sections of the boot and in forming a tight joint between the two sections from top to the bottom on the stem portion 2 and around the said hub 3. The two sections of the hub 3 are preferably formedwith outwardly-tapering internal conical seats 22. Loosely journaled in each of these oppositely-tapered seats 22 is a correspondingly-formed disk-like bearing member that constitutes a stub-trunnion 23 and which is rigidly secured to the corresponding disk 24, preferablyby means of a short nutted bolt 25, the head of which is within the corresponding seat 22 and the nut of which presses against the outer face of the disk. These stub -trunnions 23 are preferably also provided with dowel-pins 26, that engage seats in the respective disks 24. The disks 24 are thus rigidly secured to the socalled stub-trunnions 23, and when the sections of the boot are secured together the said stub-trunnions are irremovably held in working positions within the seats 22. The

disks, as is usual, are obliquely set with respect to each other and are brought down closely together at a point approximately ninety degrees ahead of the vertical line drawn through their axes, or, otherwise stated, the axes of the stub-trunnions 23 are set at an angle to each other and incline slightly forward and downward.

The disk device above described may be used either with or without outside scrapers but I have shown applied thereto outside scrapers of novel construction involving each a curved spring-rod 27 and scraper-blades 28. The scraper-blades 28 are provided with intermediate perforations 29 and with projecting staples 30, which staples are located near to the upper edges of their respective scrapers, are passed through perforations therein, and have their ends riveted. The free ends of the scraperbladesupporting rods 27 are passed through the staples 30 and their extreme ends are bent laterally at 31, and are passed through the perforations 29 of the respective scraperblades. The upper ends of the spring-rods 27 are passed one through each of the sockets 16 on the boot, and they are rigidly secured therein by the said screws 17.

When the scrapers are applied as above described, the free. edges of the blades 28 will be pressed against the respective disks 24 by the spring-arms 27, and the crooked free ends of said rods will be held in engagement with the perforations 29 of the said scraper-blades.

With the boot made in two sections on the general plan above described it is possible to cast the said two sections without the use of cores, and also simple and eflicient means are thereby provided for securing the perforated ball 7 of the grain-delivery device 1n working position. Furthermore, as already stated, the stub-trunnions of the disks are thereby secured against displacement, and a simple and efiicient form of journal is thereby pro vided.

Fig. 8 illustrates a construction wherein an integrally-formed or single-part boot 32 is employed and in which the disks are connected thereto by journals that are located entirely inward of the outer faces of the disks. In this modified construction outwardly-flaring bearing-cones 33 are secured to the lower portion of the boot, with their axes inclining forward and downward, by means of a strong screw 34. The said bearing-cones 33 also, as shown and preferred, have interlocking engagement at 35 with the boot, so that they are thereby firmly held against rotation. Rigidly secured, preferably by screws, rivets, or other means, to the inner faces of the disks 24 are annular retaining-rings 36, that engage the conical surfaces and inner faces of the said bearing-cones 33, and thus mount the disks for rotary movements upon the said cones 33.

What we claim is 1. In a disk attachment for drills, the com bination with a sectional boot and a pair of disks, of bearing members secured to the inner faces of said disks and journaled in the sections of said boot, the sections of said boot holding said bearing members against displacement,-substantially as described.

2.. In a disk attachment for drills, the combination with a two-part boot having an oilpassage and a gram-spout passage, each formed in part in each of the boot-sections, and disks journaled to said boot, substantially as described.

3. In a disk attachment for drills, the combination with a boot formed in sections, of a 4. In a disk attachment for drills, the combination with a boot formed in sections and having a feed-spout passage, an oil-duct and a bearing-hub, all of which are formed in part in each of the two boot-sections, of stub-trunnions seated one in each section of said bearing-hub and held against displacement when the sections of the boot are secured together, and disks secured one to each of said stubtrunnions, substantially as described.

' hub and normally held against displacement,

and a disk secured to said stub-trunnion for rotation therewith, substantially as described.

6. A scraper comprising a spring-rod 27 having a laterally-bent free end 31 and a scraper-blade 28 having a perforation 29 and a projecting staple 30, the free end of said rod 27 being passed through said staple 30, and the end 31 thereof being inserted into the perforation 29 of said blade, substantially as described.

In testimony whereof we affix our signatures in presence of two witnesses.

SPENCER E. DAVIS, THOMAS BRENNAN, JR.

Witnesses:

MALIE HoEL, FRANK D. MERCHANT. 1 

